V beam construction sheets and fastening means therefor



June 6, 1967 T. B. JOHNSON V BEAM CONSTRUCTION SHEETS AND FASTENINGMEANS THEREFOR 2 Sheets-Sheet 1 Filed Feb. 16, 1965 June 6, 1967 T. B.JOHNSON V BEAM CONSTRUCTION SHEETS AND FASTENING MEANS THEREFOR FiledFeb. 16, 1965 2 Sheets-Sheet INVENTOR. 7170mm? 5. Joy/vs o/-/.

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United States Patent 3,323,268 V BEAM EQNST ZUQ'HQN SHEETS AND FASTENINGB'EEANS THEREFOR Thomas ll. Johnson, Fires Ave Amhrldge, Pa. 15003 FiledFeb. 16, 1965, tier. No. 433,150 2 (Jlainis. (til. 52-483) ABSTRACT 6FTHE DTSCLUSURE Apparatus for connecting a pair of roof sheets. One edgeof the sheet has a horizontal portion terminating in a downwardlyinclined portion. The other edge of the sheet has an upwardly inclinedportion with a downwardly inclined portion adjacent thereto andterminates in a second upwardly inclined portion forming an upwardlyfacing trough. Sheets are positioned with the horizontal portion of oneedge in overlying relation with the upwardly facing trough of anothersheet. A clip member is secured to the underside of the top horizontalportion of one sheet and extends around the underside of the upwardlyfacing trough portion of the other sheet to thereby secure the sheets toeach other and to the roof structure.

This invention relates to building construction sheets of the type knownin the industry as V beam corrugation sheets and fastening means forfastening the construction sheets to the building structure.

The V beam construction sheets are secured to the sides and roof of abuilding and serve as a weatherproof sheathing for the buildings. Theconventional V beam construction sheets are illustrated and described inUS. Patents No. 1,936,228 and No. 1,982,243 and have a series ofcorrugations with a fiat top wall, a flat bottom wall and inclined sidewalls connecting the flat bottom walls and flat top walls. The V beamconstruction sheets are assembled onto a building structure with thecorrugations in generally parallel alignment by overlapping the lateralend corrugations of adjacent sheets. A selftapping threaded fastener isdriven through the fiat bottom walls to secure the sheets to thebuilding structure and a self-tapping threaded fastener is driventhrough the overlapped top flat walls to secure the adjacent sheets toeach other. The lateral inclined edge portion of the known constructionsheets terminate at a location approximately /2 the distance between theflat top wall and the fiat bottom wall. When positioned in overlappingrelation the lateral edges of the V beam sheets have a depending edgeportion that extends downwardly to a location approximately midwaybetween the valley and the crest of the construction sheet and are sopositioned that the edges are in overlapped relation to each other.

The use of the above described V beam type construction sheet inbuilding structures presents weatherproofing problems unless a sealantis provided between the overlapped portions. During inclement weather,where there is a high wind blowing transversely to the longitudinalcorrugations, water is blown upwardly between the overlapped portions ofadjacent sheets and flows over the fiat top surface of the underlyingsheet and then downwardly between the overlapped inclined side walls andinto the interior of the building.

Also where there has been longitudinal relative movement betweenadjacent sheets due to uneven expansion and contraction, the aperturesformed by the self-tapping threaded fasteners are elongated and permitthe passage of water therethrough. A portion of the water passingthrough the elongated aperture will fiow into the internal portion ofthe building. To remedy this type of leakage there are usually providedspecially constructed washers beneath the head of the self-tappingthreaded fasteners. Even with the specially constructed washers leakagethrough the apertures has been known to occur.

Accordingly, the principal object of this invention is to provide a Vbeam construction sheet having modified lateral edge portions thateliminates substantially all of the above discussed problems.

Another object of this invention is .to provide a fastening means forthe herein described V beam construction sheet that fixedly secures theconstruction sheets to each other and to the building structure.

These and other objects and advantages of this invention will be morecompletely disclosed and described in the following specification, theaccompanying rawings and the appended claims.

Briefly the present invention includes a V beam construction sheet thathas a longitudinal trough adjacent a lateral edge portion that isarranged to be positioned in underlying relation with the lateral edgeportion of the overlying sheet. A fastening means is provided that issecured to the building structure and secures the lateral edge portionof the underlying sheet and provides a receiving portion for a fastenerthat extends through the top fiat wall of the overlying constructionsheet.

For a better understanding of the present invention, its objects andadvantages, reference is made to the following written description, tobe taken in conjunction with the accompanying drawings which form a parthereof and in which:

FIGURE 1 is a perspective view of a building structure illustrating thevarious embodiments of the invention.

FIGURE 2 is a view in side elevation of a construction sheetillustrating the manner in which the herein described improvedconstruction sheet may be fabricated in two symmetrical halves.

FIGURE 3 is a fragmentary view in cross section illustrating the mannerin which the overlapped portions of adjacent sheets may be fastened toeach other and the sheets fastened to the building structure.

FIGURE 4 is a fragmentary view in cross section illustrating in detailthe overlapped portions of adjacent sheets and a fastening means forsecuring the overlapped sheets to each other and to the buildingstructure.

FIGURES 5 and 6 are views in section illustrating an intermediate clipmeans .that may be secured to the trough portion of the underlying sheetbetween the transverse building beams and the manner of securing thelateral edge portion of the overlying sheet thereto.

FIGURE 7 is a view in section of a fastening means fastening theconstruction sheets at intermediate corrugations to the buildingstructure.

FIGURE 8 is a view in section taken along the lines 8-8 of FIGURE 4illustrating in detail a portion of the fastening means that limitslongitudinal movement of the construction sheet relative to the buildingstructure.

Referring to .the drawings and particularly FIGURE 1, there isillustrated a plurality of construction sheets generally designated bythe numeral 10. Each construction sheet has a front lateral side edgeportion designated by the numeral 12, and a rear lateral. side edgeportion designated by the numeral 14. The construction sheets each havea plurality of V shaped longitudinally extend ing corrugations betweenthe lateral front side edge portion 12 and the rear lateral side edgeportion 14. The corrugations are formed with fiat top wall 16 and asubstantially flat horizontal bottom wall 18. Inclined side walls 2% and22 join the spaced horizontal flat walls 16 and the fiat horizontalbottom walls 18 to form the V shaped corrugations.

The front lateral side edge portion 12 terminates in an inclined sidewall 24 that extends substantially one-half a substantially horizontalthe distance between the adjacent flat horizontal top wall 16 and thehorizontal plane of the flat bottom wall 18. The rear lateral side edgeportion 14 terminates in a trough portion generaly designated by thenumeral 26 that is formed in the elevated top wall portion 16 adjacentthe rear later edge portion 14. The construction sheets are positionedin overlapped relation with the front lateral side edge portion 12overlapping the rear lateral side edge portion 14 of the adjacent sheet,as is illustrated in FIGURES l, 3 and 4. The overlapped portions of theconstruction sheets 10 are secured to the beam-like portions 28 of thebuilding structure by a suitable fastening means.

The construction sheets '10 may be formed from a relatively wide sheetmetal strip, as is illustrated in FIG- URE 2, wherein the V shapedcorrugations are formed in the flat strip of steel by means of suitablerolling processes. The relatively wide construction sheet is modified sothat the intermediate top wall 16 has a pair of symmetrical troughs 26therein. The side end portions of the relative wide sheet have inclinedside Walls similar to side wall 24. The relatively wide constructionsheet is then out along the line XX to form a pair of improvedconstruction sheet with the trough section 26 formed therein. Ifdesired, the relatively wide construction sheet having the pair oftroughs 26 formed therein may be used in the conventional manner and thepair of troughs 26 providean esthetic ornamental apeparance thereto. Thedescription of the construction sheet will be directed to a constructionsheet that has a rear lateral side edge portion 14 with the upwardlyfacing trough formed therein adjacent to the inclined side wall 22.

Referring in detail to the joint between the overlapped constructionsheets 10 illustrated in FIGURE 4 which includes a fastening meansgenerally indicated by the numeral 30 that secures the fastening sheetsto the building structure and to each other, the overlying rear sideedge portion 14 has an inclined side wall 32 extending upwardly from theflat bottom wall 18 and a downturned portion 34 adjacent thereto. Theinclined wall 32 and downturned portion 34 form an upwardly curved crest36 in the construction sheet rear side edge portion 14. An upwardlyinclined wall 38 extends in diverging spaced relation with the inclinedwall 34 and is joined thereto to form a downwardly facing curved portion40, the upper surface of which is the longitudinal trough 26. The edgeportion 42 of the upwardly inclined wall 38 is bent outwardly therefromto provide a male lip along the construction sheet rear side edge 14.

The fastening means 30 has a starting leg 44 which, in an unfastenedposition is in angular relation with the upper surface 46 of thebuilding structure beam 28. An intermediate substantially verticalportion or web 48 extends upwardly from the end of the starting leg 44.A laterally curved portion 50 extends from the upper end of the web 48and has a contour similar to the contour of the construction sheet rearside edge portion downwardly facing crest or curved portion 40 and theupwardly inclined leg 38. The fastening means 30 has a rebent portion 52with a lower leg 54 and an upper leg 56 that are spaced from each otherand form a receiver 58 therebetween for the construction sheet rear sideedge lip 42. The upper leg 56 extends in a plane substantially parallelto the plane of the starting leg 44 and has a dimension substantiallyequal to the construction sheet top wall 16 and a downturned edgeportion 60 that conforms to the junction between the undersurface of thetop wall 16 and the end inclined wall 24. The undersurface of thedownturned edge portion 60 conforms to the contour of the upwardlyfacing crest 36 between the upwardly inclined wall 32 and the downwardlyinclined wall 34. The fastening means upper leg 56 has a longitudinalrecessed portion 62 that forms a downwardly extending ridge .64 on theunderside of the leg 56.

The construction sheets are secured to the building structure transversebeams 28 in the following manner. A construction sheet 10 has afastening means 30 positioned over the rear lateral edge 14 with theconstruction sheet lip 42 extending into the receiver 58 of thefastening means 30. The fastening means, which may be either in the formof short clips positioned on edge of the building structure beams 28 orelongated fastening strips that extend over two or more transversebuilding structure beams 28 is secured to the building structure beam 28by a threaded fastener such as bolt 66 extending through an aperture 68in the fastening means starting leg 44 and an aperture 70 in theconstruction beam 28. Although the bolt 66 is illustrated as thefastener, it should be understood that other suitable fasteners such asrivets or the like may be used. As previously stated the starting leg 44is angularly displaced relative to the building structure beam uppersurface 46 and when the bolt 66 is tightened the starting leg 44 ismoved downwardly into the position illustrated in FIGURE 4 to therebyexert a downward force on the crest 36 between the inclined walls 32 and34 and on the lip 42 to thereby urge the construction sheet bottom wall18 into abutting relation with the building structure beam upper surface46. With this arrangement, the fastening means 30 fixedly secures therear side edge portion 14 of the construction sheet 10 to the buildingstructure 28. V

The front lateral side edge r12 of the adjacent construction sheet 10 ispositioned in overlying relation with therear side edge portion 14 ofthe construction sheet that is secured to the building structure by thefastening means 30. The inclined end side wall 24 is in overlyingrelation with the upwardly inclined side wall 32 of the overlyingconstruction sheet 10 and the undersurface of the flat top wall is inabutting relation with the upper surface of the horizontal upper leg 56of the fastening means 30. A self-tapping fastener 74 extends throughthe flat top wall 16 and the fastener horizontal leg 56 and fixedlysecures the front lateral side edge portion 12 of the overlyingconstruction sheet to the fastening means 30 and to the buildingstructure 28. I

With the fastening means 30 disclosed in FIGURE 4 and the trough 26 inthe underlying rear later side edge portion 14 of construction sheet 10,a weather-tight joint is formed between the overlapping sheets. Where,under severe weather conditions, water is forced up the upper edgeportion 24 of the overlying sheet, the water flows downwardly into thetrough 26 that extends longitudinally throughout the length of theconstruction sheets and cannot enter the interior portion of thebuilding. The trough 26 has a sutlicient depth so that dirt or otherforeign material forced upwardly between the overlapped end portions ofthe construction sheets is unlikely to cause an obstruction ofsufficient magnitude to clog the trough 26.

The leg 56 of the clip 30 has the depending portion or ridge 64 whichserves as a water stop in the event there is a leak around theself-tapping fastener 74 so that the water will collect along the underside of the ridge 64 and drain into the trough 26 and not into theinternal portion of the building structure. Where the fastening means 30is in the form of a clip, the starting leg 44 has a depending lateralflange 76 (FIG. 8) that abuts a vertical edge 78 of the beam 28,preferably the upper vertical edge, and prevents rotation of thefastening means 30 about the bolt 66 and thereby prevents longitudinalmovement of the construction sheets relative to the building structureexcept for the small amount required for expansion and contraction ofthe construction sheets.

Where there is a substantial distance between the building structurelaterally extending beams 23 it may be desirable to secure theoverlapped end portions of the construction sheets to each other toprevent sagging of the underlying sheet. There is illustrated in FIGURES5 5 and 6 a clip member generally designated by the numeral surface ofthe inclined portion 32 beneath the downturned aeaaaee 80 that may beutilized to secure the overlapped lateral edge portions to each otherwhere the fastening means vare in the form of short sections known asclips and occurring only at the supporting beams 28. The clip 30 is aclamp on type yoke clip that is illustrated in an open position inFIGURE 6 and in the closed position in FIG- URE 5. The clip 80 has asimilar configuration as the upper portion of the fastening means 30 andmay be extruded or formed from the same machinery used to form thefastening means 30. In describing the clip 80, the same numerals willdesignate portions of the clip 80 that are similar to the fastener 30.The fastener 80 has a top horizontal leg 56 with a downturned endportion 6'9 and a lower horizontal leg 54 that forms the rebent portion52 and the receiver 58. The curved portion 541 terminates in an upwardlyextending edge portion 82 that has substantially the same configurationas the under surface of trough 26.

The clip member 80 is preferably positioned on the construction sheetrear lateral side edge 14 while the construction sheets are still on theground. The clips 80 in the open position illustrated in FIGURE 6 arepositioned over the construction sheet rear side edge por tion 14 withthe lip 42 extending into the clip receiver 58. A pair of pliers orother type of tool is used to close the clip until it holds fast in thedesired location along the rear lateral side edge portion 14. Pressureis applied to the underside of the curved portion and to the upperhorizontal leg 56 simultaneously until the curved portion 59 is forcedtightly against the underside 40 of trough 26 and at the same time thelip 42 is forced tightly against the underside of horizontal leg withinthe receiver 58 and the horizontal leg downturned end portion 6%] isforced tightly against the crest 36. With the clip in place the frontlateral side edge portion 12 is positioned in overlapping relation withthe rear lateral side edge portion 14 of the adjacent sheet asillustrated in FIGURE 5. The self-tapping threaded fastener 84 securesthe top flat wall 16 to the clip horizontal leg 55 which forces thedownturned inclined wall 24 tightly against the upper inclined wall 32,of the underlying sheet. It should be understood that the clips 855 maybe used where the end portions of the construction sheets are secured tothe building structure "beams 28 in the manner previously described andalso where fastening means 30 are not employed. Another advantage of theclip fit is that the self-tapping fasteners 84 are not exposed withinthe internal portion of the building structure and they provide arelatively rigid attaching means for the self-tapping fastener 84.

If the construction sheets are of such a width that intermediatesupporting means is desired at the intermediate troughs between theoverlapped end portions, a clip fastener such as illustrated in FIGURE 5and generally designated by the numeral 86 may be used. The fastener 86has a Z shape with a horizontal lower flange 88 secured to the buildingbeam 28 and an upper horizontal leg 90 secured to the underside of theflat horizontal top wall 16 by a self-tapping fastener 92. The dimensionof the web 94 between the flanges 8% and 90 is such that the lowerflange 88 may be secured to the building structure and the tophorizontal flange 90 provides support for and a means to secure theupper horizontal top wall 16 thereto.

In certain installation it may be desirable from an economic standpointto omit the fastening means 30 and use the conventional fastening meanswhere a self-tapping fastener extends through the construction sheethorizontal bottom wall into the building structure to secure theconstruction sheets to the building structure and another fastenerextends through the overlapped top walls to secure the constructionsheets to each other. The use of the conventional method of fasteningconstruction sheets to a building structure may also be utilized withthe herein disclosed invention.

Referring to FIGURE 3 there is illustrated in section a pair of lappedconstruction sheets secured to the building structure and to each otherin a conventional manner. The construction sheets 1d are positioned withthe front lateral side edge portion 12 overlapping the rear lateral sideedge portion 14 of the adjacent sheet. The curved portion 36 i adjacentto the under surface of the construction sheet top wall 16. The frontlateral side edge inclined side wall 24 abuts the upwardly inclined sidewall 32 of the underlying construction sheet rear lateral side edge 14-.The trough 26 is spaced laterally from the inclined end wall 24 and aself-tapping fastener 1&2 extends through the front lateral side edgetop wall 16 and through the crest 36 of the rear lateral side edge 14.Fasteners 104 secure the bottom wall 18 to the building structure uppersurface 46. With this arrangement a Weather-tight joint is providedbetween the lapped construction sheets. Any water leakage between thedown Wardly inclined end 24 of the overlying sheet and the upwardlyinclined portion 32 of the underlying sheet will flow over the crest 36into the trough 26 and flow down the trough 26 and not into the internalportion of the building structure.

With the previously described means for fastening the constructionsheets, it is now possible to provide a Weather tight joint between theoverlapped side edge portions of construction sheets that have a generalconfiguration similar to known V shaped construction sheets with amodified rear lateral edge portion as herein described. The constructionsheets are formed in a manner similar to the presently knownconstruction sheets with a slight modification in the rolling equipment.The rolling equipment is modified at very little expense to form thepreviously described contour to the rear lateral side edge portion 14without changing the width of the sheet material stock. The hereindescribed modified construction sheets may be secured to the buildingstructure beams by means of self-tapping fasteners extending through thebottom horizontal walls into the building structure and through theoverlapped portions of the construction sheet lateral side edgeportions. Where additional rigidity is desired, a fastening means suchas the fastener previously described may the used to secure theconstruction sheets to the building structure and intermediate clipssimilar to clips 8t may be used when desired. With any of the abovefastening procedures there is provided a weathertight joint between theoverlapped lateral side edge portions that eliminates water leakage intothe building through the lapped joints of adjacent construction sheets.The longitudinal end portions of the construction sheets may beoverlapped in the conventional manner to provide water-tight lappedportions.

According to the provisions of the patent statutes, I have explained theprinciple, preferred construction, and mode of operation of my inventionand have illustrated and described what I now consider to represent itsbest embodiments. However, I desire to have it understood that, withinthe scope of the appended claims, the invention may be practicedotherwise than as specifically illustrated and described.

I claim:

1. In a joint for connecting a pair of construction sheets in overlappedrelation comprising,

a pair of V-shaped corrugated construction sheets each having a bodyportion with a front lateral side edge portion and a rear lateral sideedge portion,

said body having V beam corrugations with a substantially flathorizontal top wall, a substantially flat horizontal bottom wall andinclined side walls joining said flat top wall and said flat bottomwall,

said rear lateral side edge portions having an upwardly inclined portionterminating in a laterally extending substantially horizontal endportion,

said laterally extending substantially horizontal end said front lateralside edge portion terminating in a downwardly inclined side wall,

said front lateral side edge portion terminating in a downwardlyinclined side wall,

said sheets positioned with said front lateral side edge portion of oneof said sheets overlapping the rear said sheets positioned with saidfront lateral side edge lateral side edge portion of said other sheetwith said portion of one of said sheets overlapping the rear rearlateral side edge upwardly facing trough posilateral side edge portionof said other sheet with tioned beneath said adjacent overlying top wallof said rear lateral side edge upwardly facing trough said overlyingsheet and said front lateral side edge positioned beneath said adjacentoverlying top wall downwardly inclined side wall abutting the uppersurof said overlying sheet and said front lateral side 10 face of saidunderlying upwardly inclined portion of edge downwardly inclined sidewall abutting the upper said rear lateral side edge portion, urfa e ofaid nd rl in upwardly in lined orfastening means positioned between andsecuring said tion of said rear lateral side edge portion, front lateralside edge of one sheet to said rear latfastening means positionedbetween and securing said ral Side dge 0f Said other Sheet and securingsaid front lateral side edge of one sheet to said rear lat- Sheets to abuilding Structure beam positioned thereeral side edge of said othersheet and securing said n h, sheets to a building structure beampositioned there- Said fast ning m ans including a substantially horibath, d zontal lower leg secured to the building structure said fasteningmeans including a substantially horizontal m, a su stantially horizontalupper leg arranged loWer leg secured to said building structure beam, insubstantially parallel relation with said lower leg, a substantiallyhorizontal upper leg arranged in subsaid upper leg abutting theunderside of said top stantially parallel spaced relation with saidlower horizontal wall Of S overlying Sheet and abutting leg, said upperleg abutting the underside of said top said upwardly facing curvedportion of said underhorizontal wall of said overlying sheet, a fastenery g Shed, a threaded fastener t i g through extending through saidconstruction sheet top horisaid construction sheet top horizontal walland said zontal wall and said fastening means upper horizontal fasteningmeans pp horizontal leg thereby Secur leg thereby securing saidoverlying constr ti ing said overlying construction sheet to saidfastening sheet to said fastening means, means,

said fastening means having a web portion COnIigcting said fasteningmeans having a web portion connecting said upper and lower legs to eachoth id b said upper and lower legs to each other, said web portion andsaid upper leg forming a receiver thereportion and said upper legforming a rebent receiver between, aid underlying r ar lat al dg tioportion therebetween, said underlying rear lateral having a ti extendingi t id receiver, edge portion second upwardly inclined portion having.

said fastening means web portion having a curved poran end Portion x ndig into Said receiver, and

tion extending downwardly from said receiver porsaid fastening means webportion having a curved portion, said rear lateral side edge troughedporti tion extending downwardly from said receiver porsupported b id bcurved ti ith id tion, the underside of said rear lateral side edgethreaded fastener securing said horizontal top wall tfoughed PortionSupported y Said Web Curved P and said upper leg extending downwardlywithin said tion, Said fastening means Curved Portion and Said upwardlyfacing troughed portion. upper horizontal leg wedging said rear lateralside 2. In a joint for connecting a pair of construction sheets dg p tin therebetween thereby securing said rear in overlapped relationcomprising, lateral edge portion to said building structure beam.

a pair of V-shaped corrugated construction sheets each having a bodyportion with a front lateral side edge References Cit d portion and arear lateral side edge portion, UNITED STATES PATENTS said body having Vbeam corrugations with a substantially flat horizontal top wall, asubstantially fiat Egbert 52 521 horizontal bottom wall and inclinedside walls join- 4 5 6 6 1/193 ammo? "7- ing said flat top wall and saidflat bottom wall, r 0 Fulenwldcr et a1 5252O said rear lateral side edgeportion having an upwardly 2,163,840 6/1939 Hunker 52-534 inclinedportion, a downwardly inclined ortion ex- 2,178,415 10/1939 Ansel 20tending laterally from said upwardly inclined portion 3,150,453 9/ 1964Johnson 52537 and forming an upwardly facing curved portion and a secondupwardly inclined portion extending laterally from said downwardlyinclined portion and forming an upwardly facing trough,

FRANK L. ABBOTT, Primary Examiner. 55 A. C. PERHAM, Assistant Examiner.

1. IN A JOINT FOR CONNECTING A PAIR OF CONSTRUCTION SHEETS IN OVERLAPPEDRELATION COMPRISING, A PAIR OF V-SHAPED CORRUGATED CONSTRUCTION SHEETSEACH HAVING A BODY PORTION WITH A FRONT LATERAL SIDE EDGE PORTION AND AREAR LATERAL SIDE EDGE PORTION, SAID BODY HAVING V BEAM CORRUGATIONSWITH A SUBSTANTIALLY FLAT HORIZONTAL TOP WALL, A SUBSTANTIALLY FLATHORIZONTAL BOTTOM WALL AND INCLINED SIDE WALLS JOINING SAID FLAT TOPWALL AND SAID FLAT BOTTOM WALL, SAID REAR LATERAL SIDE EDGE PORTIONSHAVING AN UPWARDLY INCLINED PORTION TERMINATING IN A LATERALLY EXTENDINGSUBSTANTIALLY HORIZONTAL END PORTION, SAID LATERALLY EXTENDINGSUBSTANTIALLY HORIZONTAL END PORTION HAVING AN UPWARDLY FACING TROUGHFORMED THEREIN, SAID FRONT LATERAL SIDE EDGE PORTION TERMINATING IN ADOWNWARDLY INCLINED SIDE WALL, SAID SHEETS POSITIONED WITH SAID FRONTLATERAL SIDE EDGE PORTION OF ONE OF SAID SHEETS OVERLAPPING THE REARLATERAL SIDE EDGE PORTION OF SAID OTHER SHEET WITH SAID REAR LATERALSIDE EDGE UPWARDLY FACING TROUGH POSITIONED BENEATH SAID ADJACENTOVERLYING TOP WALL OF SAID OVERLYING SHEET AND SAID FRONT LATERAL SIDEEDGE DOWNWARDLY INCLINED SIDE WALL ABUTTING THE UPPER SURFACE OF SAIDUNDERLYING UPWARDLY INCLINED PORTION OF SAID REAR LATERAL SIDE EDGEPORTION, FASTENING MEANS POSITIONED BETWEEN AND SECURING SAID FRONTLATERAL SIDE EDGE OF ONE SHEET TO SAID REAR LATERAL SIDE EDGE OF SAIDOTHER SHEET AND SECURING SAID SHEETS TO A BUILDING STRUCTURE BEAMPOSITIONED THEREBENEATH, AND SAID FASTENING MEANS INCLUDING ASUBSTANTIALLY HORIZONTAL LOWER LEG SECURED TO SAID BUILDING STRUCTUREBEAM, A SUBSTANTIALLY HORIZONTAL UPPER LEG ARRANGED IN SUBSTANTIALLYPARALLEL SPACED RELATION WITH SAID LOWER LEG, SAID UPPER LEG ABUTTINGTHE UNDERSIDE OF SAID TOP HORIZONTAL WALL OF SAID OVERLYING SHEET, AFASTENER EXTENDING THROUGH SAID CONSTRUCTION SHEET TOP HORIZONTAL WALLAND SAID FASTENING MEANS UPPER HORIZONTAL LEG THEREBY SECURING SAIDOVERLYING CONSTRUCTION SHEET TO SAID FASTENING MEANS, SAID FASTENINGMEANS HAVING A WEB PORTION CONNECTING SAID UPPER AND LOWER LEGS TO EACHOTHER, SAID WEB PORTION AND SAID UPPER LEG FORMING A RECEIVERTHEREBETWEEN, SAID UNDERLYING REAR LATERAL EDGE PORTION HAVING A PORTIONEXTENDING INTO SAID RECEIVER, SAID FASTENING MEANS WEB PORTION HAVING ACURVED PORTION EXTENDING DOWNWARDLY FROM SAID RECEIVER PORTION, SAIDREAR LATERAL SIDE EDGE TROUGHED PORTION SUPPORTED BY SAID WEB CURVEDPORTION WITH SAID THREADED FASTENER SECURING SAID HORIZONTAL TOP WALLAND SAID UPPER LEG EXTENDING DOWNWARDLY WITHIN SAID UPWARDLY FACINGTROUGHED PORTION.